ListView Databind导致FormView数据丢失 [英] Listview databind causes lost of formview Data

问题描述

在我的代码内，通过Formview进行研究后，我需要调用listview.databind，这使得即使在屏幕上仍然出现Formview数据也无法获得. 这是我的代码

within my code , after a research via a Formview , I need to call the listview.databind and this makes impossible to get the Formview data , even if in the screen they still appear . this is my code

  protected void DemandeSearchFormView_ItemInserting(object sender, FormViewInsertEventArgs e)
    {
        ListView listview = (ListView)panelPagination.FindControl("listdeclarations");
        ViewState["search"] = "search";
        listview.DataBind();

    }

databind()通常调用此方法

the databind() normally call this method

 public DeclarationGeneraleBean RechercheByCritere()
    {
        DeclarationGeneraleBean declarationBean = new 
        DeclarationGeneraleBean();
        declarationBean.IdService = (int) Session["idService"];
        if (ViewState["search"] != null)
        {
            TextBox numOrdre = 
        (TextBox)DemandeSearchFormView.FindControl("numtxt");

}

ViewState ["search"]为null，我不知道为什么?似乎databind()为页面或类似内容重新充电. 有谁知道如何处理吗?

the ViewState["search"] is null , I dont know why ?? it seems that the databind() recharge the page or something like this . Have any one an idea how to deal with this ?

推荐答案

您是否在页面加载事件中设置了viewstate?

Do you set the viewstate in your page load event?

如果是，我认为您应该在Page_Load事件中添加一个条件:

If yes, i think you should add a condition in your Page_Load event :

private void Page_Load()
{
    if (!IsPostBack)
    {


    }
}

如果提交了帖子，则防止在此事件上重新加载数据.

it prevent the data to be reloaded on this event, if a post is submited.

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